From Halopedia, the Halo wiki
Rajtom Facility was a facility of Misriah Armory, located in Erőd on the planet Reach. The corporation's Department of Supply Distribution utilized the facility to distribute supplies to personnel of the UNSC Armed Forces stationed on Reach. The GUNGNIR-class Mjolnir, developed by Misriah Armory as part of the Office of Naval Intelligence's Project GUNGNIR, was also tested at Rajtom Facility. Merv was employed by Misriah at Rajtom in 2552. The facility was presumably destroyed during the Fall of Reach.
"Rajtom" is Hungarian for "start".
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